Cement.



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,UNITED STATES To all whom it may concern:

Be it known that I, JAMES T. MCKIM, a cititown, in the county of Boone and State of 5 Indiana, have invented a new and useful Oement,.of which the following is a specification. 1

My invention relates to an improvement in a hydraulic, cement.

The object of my invention is to produce a hydraulic cement which shall be fine in texture, solid, strong, and totallyimpervious to moisture.

In the production of my cement I take ap- 15 proximately forty-nine parts of calcareous ocher (preferably such as is foun 1n vicimty of Amestown, Alabama,) approximately forty-nine parts of commercial ironore aintand approximately two parts of 2d lithar c all by dry measure, and mix thor- I} ougHly by passing through a mill which will .wvtg- 'f t m ssltpanner msr- This mass 1W 'is then submitted to a temperature of 160 Fahrenheit, being stirred frequently. After :5 the mass has been heated it is placed in a cool dry place for about forty-eight hours. I term the compound thus formed calcareous compound, and of this take approximately ten parts, of clean sharp sand approximately I '30 seventy parts, and of commercial Portland cement '(or its equivalent) approximately seventy parts, mixing and adding to the whole sufiicient water to work. The calcareous compound may e increased or diminished about 35 ten per cent. to suit variations of temperature and soil. The cement described has been especially produced f or the construction of a seamless cement burial vault for single interments,

- zen of the United States, residing at Thorn- PATE T OFFICE.

JAMES T. MOKIM, OF THORNTOWN, INDIANA, ASSIGNOR OF ONE- HALF TO LEWIS MILLER, OF THORNTOWN, INDIANA.

, Y Y CEMENT.

SPECIFICATION forming part of Letters Patent No. 704,849, dated July 15, 1902. Application filed January 22, 1902. Serial No. 90,833- (No specimens.)

similar cement,consisting of calcareous ocher,

iron-ore paint and litharge thoroughly ground,

subjected to a temperature of 160 Fahren-- heit and then cooled. 1

5. A cementcomposedof approximately ten parts of a calcareous compound consisting of approximately forty-nine parts calcareous ocher, forty-nine parts iron-ore paint, and

two parts litharge; approximately seventy parts of Portland or similar cement; and

approximatelyseventy parts of clean sharp sand.

6. A cement composed of approximately ten parts of a calcareous compound consisting of approximately forty-nine parts calcareous ocher, forty-nine parts iron-ore paint, and two parts 11' tharge, ground, subjected to 160 Fahrenheit and cooled; approximately sev-. enty parts of Portland or similar cement;

and approximately seventy parts of clean sharp sand.

' JAMES T. MoKIM. Witnesses: i

" CHAS. W. MCLAUGHLIN,

J OHN E. LA Run. 

